Driving mechanism and automatic stop means therefor



G. J. UHLIG Oct. 29, 1935.

DRIVING MECHANISM AND AUTOMATIC STOP MEANS THEREFOR Original Filed Deo. 50, 1935 2 Sheets-Sheet 2 DRIVING MECHANSM AND AUTOMATIC STOP MEANS THEREFOR George J. Uhlig, Chicago, Ill., assignor to Vctor Adding Machine Company, Chicago, Ill., a corporation of Delaware orsi Original application December 30, 1933, Serial No. 704,648. Divided and this application July 2, 1934, Serial No. 733,449

14'c1aims. (o1. isz-149) This invention relates to improvements in drivview of the clutching mechanism with parts ing mechanism and automatic stop means therethereof being-shown partially in elevation. for which is more particularly adapted for con- The mechanism includes a housing 15 provided trolling the connections of machines with their With a plurality of ears I6 for attaching and supsource of power, and is a division of my pending porting the device in position on a frame l1 5 application, Serial No. '704,648,1i1ed December 30, which is secured to the bottom wall I8 of the 1933. adding machine. The housing lI5 is provided 'Ihe device is illustrated as being attached to with a horizontally extending portion I5a for an adding machine in which a single revolution housing a motor I9 which has a shaft 20 jour- 10 or cycle is required for its normal oper-ation to naled in a bearing 2l supported on a Wall 22 l0- set up the parts and position the type bars for disposed between the housings l5 and 15a. The making an impression thereof and for restoring shaft 26 of the motor l 3 is provided with a transthem to their normal positions during the cycle. Verse tongue portion 23 which ts into a trans- Provision is also made whereby a number of suc- Verse slot opening 2i milled in one end of a Worm cessive cycles may be had at the will of the oper- 25 and axially aligned therewith to be driven l5 ator. by the motor I9. The worm 25 has its other end The chief objects of the invention are the proportion journaled in an adjustable bearing 26 vision of mechanism adapted to be engaged and carried in the outer wall of the housing l5 driven for a complete cycle under the driving Which serves as an end-thrust bearing for takpower of a motor and to be automatically disening the driving thrust of the worm 25 while 2Q gaged and brought to rest in a predetermined podriving a worm-wheel 21 carried in the housing sition upon the completion of the cycle. i5 for driving the mechanism. The Worm-wheel Another object is the provision of a finger bar 2l is in the form of a ring-gear being provided which is manipulated by the operator in starting with a central bore 28 and is supported for turna the operation of the machine and which has ing movements with and independently of a connections cooperating with the driving mechshaft 29 that extends therethrough and is mountanism for electing and for automatically released thereon by means of a collar 30 freely caring the driving connection upon the completion ried on the shaft 29 by means of a disc 32. The of the cycle. The invention is capable of being disc 32 is fixed to one end of the collar 30 and S0 employed with particular advantage in connechas the studs 33 and 34 xed thereto in diametri- 30 tion with a constantly running motor, since the cally opposed relation with their free ends exdriving mechanism is controlled for engagement tending through openings 35 and 35 respectively by means of the finger bar and is automatically in the worm-wheel 2l for supporting the same disengaged upon the completion of the cycle. concentrically on the shaft 29. Each of the studs e5 Still another object is the provision of yieldable 33 and 34 are provided with the shoulder 33a and 35 means between the driving and the driven parts 34a respectively adjacent the disc 32 for supportfor cushioning the shock at the start of the oping the worm-Wheel 2l in spaced relation thereerating stroke and at the completion of the cycle with. The shoulder 33a, of the stud 33 provides when the mechanism is disengaged. for the attachment of the leg 31 of a torsion *i0 In the accompanying drawings embodying my spring 38 which has its body portion encircling 40 invention, I show the device as being attached to the collar 30 and disposed within the bore 28 of an adding machine, but do not wish to be limthe Worm-wheel 2 and with the other leg 39 ited to the operation and action solely to an atof the torsion spring 38 fixed to a stud 40 on a tachment while all oi the features embodied lever member @I which is fixed to a collar 42 carin these improvements will be substantially the ried in fixed relation for turning movements with 45 same. the shaft 23 by means of a pin 43.

Figure l is a side elevation illustrating my The stud 3Q is relatively longer than the stud device as attached to an adding machine with 33 and extends into the path of the lever memthe casing thereof in cross-section and the conber il which is normally urged against the stud trol parts extending from the device to operate 3Q by means of its connection with theV torsion 50 the machine. spring 38 secured thereto.

Figure 2 is an enlarged det-ail cross-sectional With this construction, the torsion spring 38 view taken substantially on the lines 2-2 of will permit of a exible drive between the Worm Figs. 1 and 3. 25 and the driven shaft 29, and to relieve the Figure 3 is an enlarged longitudinal sectional driving strain on'the torsion spring 38, I pro- 55 vide a drum 44 which is carried on the wormwheel 21 and driven therewith by means of the studs 33 and 34 extending through the openings 46 and 41 respectively in the drum 44. A band 48 extends within the drum 44 and yieldingly engages the inner periphery thereof by means of the compression spring 53 interposed between the inturned ends 49 and 50 and guided on the reduced portions 5| and 52 thereof. 48 is provided with cut-away portions 54 and 55 respectively on one edge thereof to receive the opposite ends 4|a and 4|b of the lever member 4| therein for turning movements therewith.

During the turning movements of the worm 25, the worm-wheel 21 will be driven thereby and the drum 44 fixed thereto will frictionally drive the band 48 and carry the lever 4| therewith by means of its connection with the band at 54 and 55 and the arm 4| will also be driven by means of the leg 39 of the torsion spring 38 being xed thereto and with its other leg 31 carried with the worm-wheel 21. The above constitutes the flexible driving mechanism for the driven shaft 29 that has means thereon for engaging the driving mechanism and which is connected to the parts of the machine to be driven.

The arm 4| carries a toothed wheel 236 in spaced relation therewith on spacing studs 231 and is adapted to be intermittently engaged to drive vthe machine. A crescent-shaped arm 228 having an inwardly turned extension 234 which is adapted to normally overlie the teeth 235 of the wheel 236 and is pivotally mounted on a pin 230 carried on a member 23| with its free end portion provided with an outwardly extending pin 226 that extends through a slot opening 221 in the member 23| for limiting its movements thereon. The arm 228 is normally urged in one direction by means of a tension spring 233 connected to the free end thereof and to an ear 23|a of the member 23| which tends to draw the arm 228 to cause the extension 234 thereof to engage the teeth 235 of the wheel 236 as this extension 234 is normally retained out of engagement with the teeth 235 by means of the pin 226 engaging a stop-arm 225 that extends into its path of travel.

The member 23| is xed to a collar 232 which is secured to a sleeve 238 that surrounds the reduced end 229 of the shaft 29 and extends outwardly through a cover-plate 258 and is journaled in the bearing 239 therein. A speed control cam 256 is secured to the free -end of the bushing 238 and is turnable as a unit with the member 23| so that as the crescent-shaped arm 228 carried thereon is released and the extension 234 thereof engages the teeth 235 of the wheel 236, the member 23| and the speed control cam 256 will be driven as a unit with the driving mechanism under the driving action of the worm-wheel 21 and the worm 25, and by reason of the cam 256 being connected to the operating parts of the machine, a driving action thereof will be had.

A link 200 is pivotally connected to the cam `256 by means of a pin 299 and at its other end is pivotally connected with a lever |02 xed to the actuator shaft |03 of the machine so that a rotary movement of the cam 256 will cause a rocking movement of the lever |02 to rock the actuator shaft |03 for the operating movement of the machine.

To actuate the device, I provide a nger bar |23 carried for vertical sliding movements 0n the The bandl casing of the machine and which has a frame |23a provided with a slot opening |31 at its lower-most end portion through which a pin |38 extends being xed to the casing of the adding machine to guide and limit the movement in 5 either direction of the finger bar |23. The lower end of the nger bar frame |2311. normally rests against a pin |39 xed to an arm |40 which is iixed for rocking movements with the arm 240 which is pivotally connected to a link 220 by 10 means of a pin 22| and has its other end connected by means of a pin 222 to an arm 223 secured to a stud V'shaft 224 to which the stop arm 225 is secured. The link 220 extends beyond the arm 223 and is pivotally connected to apcontact l5 lever 255 which carries an insulated roller 251 adapted to engage a leg |9| of a contact switch |92 that is connected to the motor I9 and has the leads 94 and 96 connecting the same to a source of power supply. 20 Upon depressing the finger bar |23, the lower end of the frame |23a thereof will engage the pin |39 and cause a rocking movement of the arms |40 and 240 and exert a pull on the link 226 and cause a rocking movement of the arm 25 223 and the stud shaft 224 to carry the stop-arm 225 out of the path of the pin 226 fixed to the crescent-shaped arm 228 and permit the same to be drawn by means of the tension spring 233 until the extension 234 thereof engages the teeth 30 235 of the wheel 236. The pulling action of the link 220 will cause the contact lever 255 to rock and the roller 251 carried thereon to engage the leg |6| of the Contact switch |92 and close the circuit to energize the motor I9 and drive the 35 worm 25 and the worm-wheel 21. The driving movement of the worm-wheel 21 will carry the toothed-wheel 236 therewith by reason of its connection with the torsion spring 38 which is also connected to the lever member 4| that carries 40 the toothed-Wheel 236 and when engaged by the extension 234 of the crescent-shaped arm 228 will drive the speed control cam 256 to drive the machine. The speed control cam 256 is provided with a-cam portion 2:56a that engages a roller 45 265 carried on a pin 204 which is secured to a rocker arm 206 mounted on a pin 255e and which has an overhanging extension 201 adapted to engage the roller 251. The rocker arm 206 has a tension spring 212 connected thereto and to 50 the bottom wall I8 of the machine for urging the roller 205 in engagement with the periphery of the disc 256 and as the cam portion 256a thereof is moved in advance of the roller 205, this tension spring 212 will cause a rocking movement 55 of the rocker arm 266 until the extension 261 thereof engages the roller 251 for retaining the leg |9| of the contact switch 92 in closed position.

The link 226 is operatively connected to the G0 contact lever 255 by means of a slot opening 220a having a guide block 220D slidably mounted therein and pivotally attached to an arm 255D of the Contact lever 255. This slot opening 22041 permits of a sliding action of the link 220 with G5 respect to the contact lever 255 so that upon its restoring movement no action will be had on the contact lever 255 and the roller 251 thereof will be retained in Contact with the leg |9| of the contact switch |92 by means of the arm 205 70 under the influence of the tension spring 212 and the arm 255i) will be moved only when the cam Y portion 256a of the cam 256 has passed over and beyond the roller 205 of the arm 236 (Fig. 1). At this time the arm 206 will be rocked 75 against Ythe spring 212 and cause the extension 201 to be raised out of contact with the roller 251 and the spring tension in the leg |9| of the contact switch |92 will cause the contact lever 255 to rock on the xJivot pin 255a and permit of its movement in the slot opening 22M of the link 22|).

As the linger bar 23 is released, a tension spring 24| Xed to the arm 24|! and to the frame l1 will exert a tension on the link 225 and restore the arm 223 and the stop-arm 225 and will also cause a movement of the link so that the opening 225er thereof will freely permit the link to slide to relieve the pulling strain on the contact lever 255. As the rise of cam portion 256a of the disc 255 has passed the roller 225 of the arm 25B the extension 201 thereof will be moved free of the roller 251 and permit the leg |9| of the contact switch |92 to spring to open position to open the circuit.

The link 226 is connected to the arm 223and to the contact lever 255 so that the movement of the link 222 under the control of the finger bar |23 controls the disengagement of the stoparm 225 and the engagement of the leg |9| to close the circuit in the contact switch |92 to the source of supply.

A constantly running motor may be used with a driving mechanism of this type and when used, the contact lever 255 and roller 251 carried thereon may be omitted, as a manually actuated contact switch will serve the purpose for closing the circuit to start the motor.

It will be noted, that with the construction shown in the drawings, the depression of the ngerbar |23 simultaneously removes the stoparm 225 from abutting engagement with the pn 225 of the crescent-shaped arm 228 and closes the circuit by causing the movement of the contact lever 255 to cause the roller 251 thereof to depress the leg I9! and close the contact switch 92 from the main source of supply to the motor I9. When a constantly running motor is used, the link 22D operatively connected to the finger bar |23 and to the arm 223 does not extend to the contact lever 255 as the contact switch is then arranged for manual manipulation independently of the finger bar |23. The arm 206 however, remains in position with its roller 285 engaging the periphery of the speed control cam 255 under the tension of the spring 212 which rin either case serves to assist the turningV movement of the cam 256 at the start of its movement as the stopping position' is about half way of the fall of the cam portion 255:1 and as the stop arm 225 is moved out of engagement with the pin 226, the spring 212 which is constantly urging the roller 205 against the fall of the cam portion 2560, will cause a starting movement of the speed control cam which will be carried for a full cycle under the driving force of the motor IS.

As the stop arm 225 is released from the pin 226, the extension 234 of the crescent-shaped arm 228 will engage the teeth 235 of the wheel 236 and should this wheel 236 be in driving relation with the motor I8, a cushioning effect will be had therebetween to absorb the starting shock by means of the torsion spring 38 interposed between the worm-wheel 21 and the toothed-wheel 236. 'I'he band 48 which is normally in contact with the drum 44 carried with the worm-wheel 21 adds a frictional tension to the turning movements of the lever member 4| and the toothedwheel 236 carried thereon as the extension 234 is released for engagement therewith.

I contemplate as being included in these improvements all such changes, variations and departures from what is thus specifically illustrated and described as fall within the scope of the appended claims.

I claim:-

1. A device of the character described, comprising in combination, a driven shaft, an electric motor for driving the driven shaft, engageable means including a resilient connection between the motor and the driven shaft, clutch means coacting with said resilient driving means, means coacting with said clutch means normally urging the same to engage said engageable means, stop means coacting with the clutch means disengaging the same from the engageable means, and manually controlled means for releasing said stop means to eiect the engagement of the clutch means with the resilient driving means and the turning movements thereof with the driven shaft.

2. A device of the character described, comprising in combination, a driven shaft, an electric motor for driving the driven shaft, resilient means including frictional means having a driving connection with the motor, clutch means coacting with said resilient means and frictional means, said clutch means being adapted to intermittently engage said resilient and frictional means to drive the driven shaft, and means in the path of movement of and coacting with the clutch means for disengaging the same from the driving means in timed relation with a revolution of the device.

3, A device of the character described, comprising in combination, a driven shaft, an electric motor for driving the driven shaft, engageable means including a resilient connection between the motor and the driven shaft, clutch means coacting with saidengageable means for driving mechanism outwardly thereof, said clutch means being adapted to intermittently engage said engageable means, manually controlled means, stop means under the control of the manually controlled means and coacting with the clutch means retaining the clutch means disengaged from the engageable means, and means whereby the clutch means is engaged with the engageable means when the manually controlled means is 'operated and held engaged during a complete cycle of operations.

4. A device of the chara-cter described, comprising in combination, driven engageable means, an electric motor including connections for driving the engageable means, a circuit for the motor including a switch normally retaining the circuit open, said engageable means adapted to be driven with the motor as the switch is closed in the circuit, engaging means coacting with the engageable means, manually manipulative means having connections with the switch and the engaging means for simultaneously closing the -swtch inthe circuit and enabling the connection of the engaging means with the engageable means and means under the control of the manually manipulative means whereby the switch will be moved to open the circuit and the engaging means will be disconnected from the engageable means upon the completion of a cycle of said engageable means.

5. A deviceY of the character described, comprising in combination, a main driven shaft, an electric motor for driving the driven shaft, engageable means including a resilient connection Cil between the motor and the driven shaft, a circuit for the motor including a switch normally retaining the circuit open, the said engageable means being adapted to be intermittently connected to the parts to be driven and permanently connected with the motor, clutch means coacting with said engageable means for driving the mechanism outwardly thereof, and manually controlled means having connections with the switch and the clutch means for simultaneously closing the circuit to the motor and to cause engagement of the clutch means with the engageable means, stop means in the path of travel of the clutch means causing the disengagement thereof with said engageable means, and means whereby said switch is opened in the circuit in timed relation with a revolution of the device.

6. A device of the character described, ccmprising in combination, driven engageable means, an electric motor including a yieldable connection for driving the engageable means, a circuit for the motor including a switch normally open in the circuit, the said engageable means being adapted to be driven with the motor as the switch is closed in the circuit, manually controlled means adapted 'to close the said switch providing a driving connection between the motor and the driven shaft, and clutch means coacting with the engageable means to be driven thereby, and means under the control of the manually controlled means whereby said switch will be moved to open the circuit and the clutch means will be disengaged from the engageable means upon the completion of a cycle of said engageable means.

7. In combination, a machine, a motor for driving said machine, resilient means including engaging means forming a driving connection between said motor and said machine, means actu-V ated by a common control for connecting said engaging means with the resilient means and for connecting said motor with a source of power to drive the resilient means with the engaging means whereby upon the completion of a cycle said motor will be disconnected from the source of power and said engaging means will be automatically disengaged from said resilient means.

8. A device of the character described, come prising in combination, a main driven shaft, an electric motor for driving the driven shaft, a circuit for the motor including a switch normally retaining the circuit open, the said driven shaft adapted to be permanently connected to the motor and intermittently connected to parts to be driven, stop means in the path of the turning movements of the driven shaft disabling the connection of the parts therewith, and manually controlled means adapted to close the switch providing a driving connection between the motor and the driven shaft and to effect the release of 'said stop means for enabling the connection of the parts for a cycle of operations with the driven shaft.

9. A device of the character described, comprising in combination, a main driven shaft, an electric motor for driving the driven shaft, a circuit for the motor including a switch normally open in the circuit, mechanism adapted to be driven by the main driven shaft and intermittently connected to parts to be driven, means actuated by a common control for closingthe switch to the motor and for connecting the mechanism with the main driven shaft, and means coacting with the turning movements of the mechanism and under the control of said common control whereby said mechanism is disengaged from the driven shaft at the completion of a cycle of said driven shaft.

10. A device of the character described, comconnect said driven shaft to parts to be driven v whereby said switch is opened in the circuit and the parts driven are released in timed relation with a revolution of the device.

11. A device of the character described, comprising in combination, a driven shaft, an electric motor for driving the driven shaft, engageable means including a resilient connection between the motor and the driven shaft, means coacting with said engageable means for driving mechanism outwardly of the device, said last named means being adapted to intermittently engage said resilient driving means, stop means coacting with the last named means for disengaging the same from the engageable means, the said resilient connection permitting of a differential movement of the engageable means with the motor for absorbing the connecting and disconnecting shock to the device.

-' 12.` A device of the character described in combination with a machine having'a cycle of oper- 35 ations, an electric motor for driving said machine, a source of power connected to said motor, resilient means including a clutch for forming a driving connection between said motor and said machine, said clutch comprising a toothed wheel 40 carried with the resilient means, an oscillating member carried for engagement with the toothed wheel to drive the machine, and means for automatically disconnecting the oscillating member from the toothed wheel upon the completion of each cycle of operations.

13. In combination, a machine, a motor for driving said machine, resilient means including frictional ,means forming a driving connection between the motor and the machine, clutch means 50 coacting with the resilient means, means including a manually manipulative member for actuating said clutch and for connecting the motor with a source of power, and means in the path of said clutch and under the control of the manu- 5 5 ally manipulative member for disconnecting the same upon the completion of a cycle of operations.

14. In combination, a machine, a motor for driving said machine, resilient means including frictional means forming a driving connection between said motor and said machine, clutch means coacting with the resilient means, means actuated by a common control for connecting said clutch means with the resilient means and for connecting said motor with a source of power to drive the resilient means with the clutch means whereby upon the completion of a cycle said motor will be disconnected from the source of power and said clutch means will be disengaged from the resilient means, said frictional means frictionally resisting the resilient means during the engagement and disengagement of the clutch means therewith.

GEORGE J. UHLIG. 

